I would like to know if it is possible or if there are any tools created to allocate some unused system ram to act as a large HDD/SSD buffer on Linux Mint 15.
I know it is possible within Windows 7, using a third party tool, PrimoCache http://www.romexsoftware.com/en-us/primo-cache/index.html
This tool gives great file benchmark results with atto and HDtune, but since I have now moved to linux, I would like to achieve the same thing & be able allocate some of my RAM to supplement disk caching. While I cannot make the disk any faster, it will help with inter-system data exchanges, if there is a possibility to adjust deferred write as well would be useful.
I am using:
Linux SR2 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Use Ram as suplimental HDD Buffer/Cache?
Forum rules
Before you post read how to get help. Topics in this forum are automatically closed 6 months after creation.
Before you post read how to get help. Topics in this forum are automatically closed 6 months after creation.
-
XenonK
Use Ram as suplimental HDD Buffer/Cache?
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
-
passerby
Re: Use Ram as suplimental HDD Buffer/Cache?
Linux does this automatically. The amount is up to your system. Not sure how easy it is to change that value, but I'd leave it for the system to manage.
You can offload entire directories to RAM by editing your fstab file. eg. In my fstab file I have the line
which moved my /tmp (temp file) directory to RAM.
I know that isn't what you asked about, but I thought it was worth mentioning.
You can offload entire directories to RAM by editing your fstab file. eg. In my fstab file I have the line
Code: Select all
none /tmp tmpfs defaults,nosuid 0 0I know that isn't what you asked about, but I thought it was worth mentioning.
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
Thanks for your suggestion passerby, I will try it out later onpasserby wrote:Linux does this automatically. The amount is up to your system. Not sure how easy it is to change that value, but I'd leave it for the system to manage.
You can offload entire directories to RAM by editing your fstab file. eg. In my fstab file I have the linewhich moved my /tmp (temp file) directory to RAM.Code: Select all
none /tmp tmpfs defaults,nosuid 0 0
I know that isn't what you asked about, but I thought it was worth mentioning.
For now Ive just done some tweaking to some of these settings:
Code: Select all
nano /proc/sys/vm/swappinessCode: Select all
nano /proc/sys/vm/dirty_writeback_centisecs Code: Select all
nano /proc/sys/vm/dirty_background_ratioCode: Select all
nano /proc/sys/vm/dirty_ratioAny advice on those settings? I'm pretty much playing around at this point, not really sure where I should set them.
Do you know any other tweaks etc, which could help with caching/buffering or general system improvement. RAM isn't a problem for me, I have 24GB of it, and 2 Xeons. I really just want to see blinding system performance. My data on the system is not critical. I do a lot with FTP over 10Gbps LAN, so I would love to improve the performance of that if that's achievable. My FTP server is running Debian, and I have tweaked the /etc/security/limits.conf file to give users very high proiorties by default, can I do the same for ionice?
Last edited by XenonK on Sat Oct 05, 2013 6:20 am, edited 1 time in total.
-
catweazel
- Level 19
- Posts: 9763
- Joined: Fri Oct 12, 2012 9:44 pm
- Location: Australian Antarctic Territory
Re: Use Ram as suplimental HDD Buffer/Cache?
Install and configure profile sync daemon, and add these lines to /etc/fstab:XenonK wrote:passerby wrote:Do you know any other tweaks etc, which could help with caching/buffering or general system improvement. RAM isn't a problem for me
Code: Select all
tmpfs /tmp tmpfs noatime,nodev,mode=1777 0 0
tmpfs /var/log tmpfs defaults,noatime,mode=0755 0 0
tmpfs /var/lock tmpfs nodev,nosuid,noatime,mode=1777 0 0
tmpfs /var/run tmpfs nodev,nosuid,noatime,mode=1777 0 0
You can also roll your own kernel and up the RAM allocated to ram disks.
"There is, ultimately, only one truth -- cogito, ergo sum -- everything else is an assumption." - Me, my swansong.
-
passerby
Re: Use Ram as suplimental HDD Buffer/Cache?
You may notice a performance increase by swapping IO schedulers. The default is cfq. Using the mainstream kernel, you can also swap to noop and deadline.
Comparison of those three: http://www.phoronix.com/scan.php?page=article&item=linux_iosched_2012
If you have a patched or alternate kernel, you can use others, such as bfq. I don't have a worthwhile comparison with bfq to show you, but there are youtube videos and such if you google it.
If you wind up using a significant amount of your RAM, you may wish to decrease your system's swappiness. That way, you can use more RAM before your system starts swapping to disk.
If you're running applications directly on the machine (not just leaving the same services idle until needed), installing preload will result in further application caching (anticipatory caching based on what you use).
Comparison of those three: http://www.phoronix.com/scan.php?page=article&item=linux_iosched_2012
If you have a patched or alternate kernel, you can use others, such as bfq. I don't have a worthwhile comparison with bfq to show you, but there are youtube videos and such if you google it.
If you wind up using a significant amount of your RAM, you may wish to decrease your system's swappiness. That way, you can use more RAM before your system starts swapping to disk.
If you're running applications directly on the machine (not just leaving the same services idle until needed), installing preload will result in further application caching (anticipatory caching based on what you use).
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
Thanks catweazel, I have installed profile sync daemon, and added the following lines to the /etc/fstab. Now I will have to perform some tests.catweazel wrote:Install and configure profile sync daemon, and add these lines to /etc/fstab:XenonK wrote:passerby wrote:Do you know any other tweaks etc, which could help with caching/buffering or general system improvement. RAM isn't a problem for meAll logs will be lost when you shutdown or reboot. The lines above cause the logs and other temporary areas to be stored in RAM. Delete all existing logs in /var/log first.Code: Select all
tmpfs /tmp tmpfs noatime,nodev,mode=1777 0 0 tmpfs /var/log tmpfs defaults,noatime,mode=0755 0 0 tmpfs /var/lock tmpfs nodev,nosuid,noatime,mode=1777 0 0 tmpfs /var/run tmpfs nodev,nosuid,noatime,mode=1777 0 0
You can also roll your own kernel and up the RAM allocated to ram disks.
Is swapping the IO scheduler an easy task? I will take a look on youtube in a moment to see the differences, I would like to get more performance where possible.passerby wrote:You may notice a performance increase by swapping IO schedulers. The default is cfq. Using the mainstream kernel, you can also swap to noop and deadline.
Comparison of those three: http://www.phoronix.com/scan.php?page=article&item=linux_iosched_2012
If you have a patched or alternate kernel, you can use others, such as bfq. I don't have a worthwhile comparison with bfq to show you, but there are youtube videos and such if you google it.
If you wind up using a significant amount of your RAM, you may wish to decrease your system's swappiness. That way, you can use more RAM before your system starts swapping to disk.
If you're running applications directly on the machine (not just leaving the same services idle until needed), installing preload will result in further application caching (anticipatory caching based on what you use).
So if I get what you are saying, a swapiness setting of 100 will be no good for me.... I would have to set this to something lower like 5 prehaps?
Last edited by XenonK on Sat Oct 05, 2013 7:22 am, edited 1 time in total.
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
Sorry here are the complete benchmark results.
sorry if its a bit long.
sorry if its a bit long.Code: Select all
SR2 current # iozone –R -a -b /home/adam/Documents/output.wks
Iozone: Performance Test of File I/O
Version $Revision: 3.397 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
Ben England.
Run began: Sat Oct 5 11:56:49 2013
Auto Mode
Command line used: iozone -a -b /home/adam/Documents/output.wks –R
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
64 4 627470 1638743 4018152 12902017 5860307 1933893 3203069 3165299 9318832 3958892 1933893 3541098 6421025
64 8 801764 1933893 4897948 794053912902017 5389653 4564786 3541098 7100397 2892445 2278628 4564786 7940539
64 16 799377 1933893 7100397 2273779110821524 4897948 4897948 5860307 10402178 4564786 3203069 5283570 15972885
64 32 1279447 2067979 7100397 900617912902017 5860307 4207076 4274062 6421025 2892445 3363612 4897948 9318832
64 64 889431 2067979 12902017 710039712902017 4643754 3203069 4274062 4274062 5860307 2772930 4564786 20962191
128 4 1152564 1878447 4717434 10779307 9129573 4012317 3895854 5325799 4759253 4135958 2367096 4407601 8036304
128 8 895074 1967960 5122535 640613810779307 5074121 5847904 6330599 8036304 4934216 2784517 6114306 12842051
128 16 1015251 2238774 5784891 1588107811720614 5545860 3982553 3759450 6114306 3867787 2511022 6727225 14200794
128 32 1196221 2248149 6114306 1420079411720614 6114306 4759253 6406138 7176872 5545860 2784517 4267461 14200794
128 64 1306873 2211113 9129573 6727225 9129573 5847904 6114306 6727225 8548124 4267461 4267461 6406138 16365173
128 128 1561553 2175277 12842051 912957312842051 5784891 6114306 6406138 6727225 6114306 3445772 6406138 14200794
256 4 1185399 2205688 5971678 5455847 8271916 4332998 5022044 5455847 6595234 4197489 2305128 3994490 5022044
256 8 1369908 2872459 6719046 1281227710651598 5428265 4929815 6891544 7735574 3935921 2285501 5455847 6936061
256 16 1549845 3368013 6249745 1281227711091721 5687020 5687020 6073004 6891544 3123106 3557725 6249745 12228612
256 32 1471270 3078337 6249745 1281227711569783 6107548 4652146 6398720 11569783 5242734 2880164 6595234 12812277
256 64 1619994 3114048 8024634 1362518012228612 6249745 6073004 6554972 9114515 5687020 3879045 6554972 13454450
256 128 1407621 2726577 8888172 712003411695808 6213578 6595234 6719046 9192546 4652146 4404088 6249745 6719046
256 256 1755037 2754556 12228612 1222861211569783 6073004 5320671 6107548 5022044 5455847 2911402 6213578 12228612
512 4 1354190 2782414 5164632 5439343 8394979 4411377 4827914 5509113 7758090 3941742 2906696 5566231 8394979
512 8 1575781 3081897 6736026 631973910856530 5278892 4650188 6632013 10434519 4882800 3122224 5807059 8018812
512 16 1571169 3239989 6843354 588665011374040 5566231 5886650 6736026 9510316 4827914 2979282 5067142 6018636
512 32 1589779 2958758 7211022 880817611943357 5822804 5509113 6086873 7620440 5127637 3122224 5164632 6246213
512 64 1635797 2979282 6571132 665255812499490 6246213 6652558 6156675 8701110 4871723 3659616 6319739 12797441
512 128 1707325 2991733 6736026 762044011877300 6246213 6174377 6821616 8955098 5684095 4131319 5822804 12215097
512 256 1801873 3029721 8140399 601863611620224 3877684 5870558 5886650 8140399 4532414 5278892 6035551 8265729
512 512 1897396 3366987 11374040 1187730011620224 5624545 6395018 5822804 6174377 5624545 3913012 6319739 11620224
1024 4 1452570 2892612 6059442 8750850 8457895 4339202 5018624 5310258 6489770 4199201 2805690 5071963 7826025
1024 8 1584972 3037876 6559147 7941793 9832672 4832290 6355328 6963241 9402175 4674510 3018660 6317933 8970167
1024 16 1651398 3170172 6733974 759088710230845 4659297 6692005 6874084 10158253 4805258 3170172 5782087 7113161
1024 32 1815435 3458646 6559147 781179111773301 5853003 6317933 7054742 9946527 5120336 3390391 5917516 7319232
1024 64 1815435 3291652 7257394 8750850 9045736 6244448 5720477 7369466 12828238 4949226 3369115 6355328 7811791
1024 128 1777861 3369115 7008693 1136819011773301 6208343 6355328 7113161 12173747 5417427 3643490 5720477 9855234
1024 256 1762539 3390391 6776473 1113246211249091 5853003 5925680 6441107 10134284 5444898 3999762 5782087 9485232
1024 512 1896395 3603747 8183918 1161411811645609 5821271 6208343 6059442 8061038 4594502 5885083 6280976 10230845
1024 1024 1885572 3778101 11489839 1164560911645609 5821271 6317933 5821271 6441107 5813392 3908759 6441107 10230845
2048 4 1486197 2920945 4923146 9062970 8423109 4423683 5159722 5389574 8128206 4248644 2879817 4889518 9567698
2048 8 1728424 3219850 5372719 1170600610903620 5389574 4697018 7013303 9015410 4886737 3215029 6690992 10389302
2048 16 1798259 3330973 6603549 914011711380325 5765808 6823876 6895083 10339282 5020987 3368858 6603549 8784909
2048 32 1838281 3447273 7112016 948319711851361 6132138 6007763 6917293 10452512 5029807 3396834 6149699 8749118
2048 64 1906837 3525079 5970183 985303712488897 6340344 6149699 7311791 11564174 5306340 3436240 7088541 9567698
2048 128 1887563 3525079 6738230 1055526411966935 6397004 6149699 7343043 11072275 5251194 3454204 5754221 11320334
2048 256 1948800 3436240 6649556 1151765711380325 5953632 6303124 6588354 10240672 4720248 3650932 5578583 10503637
2048 512 1967097 3675930 7159438 1162678411579763 5836323 6345027 6378005 9268323 5461535 4248644 6340344 11320334
2048 1024 1889224 3677503 8190205 1170600611579763 5804771 6420913 6167360 8221561 3975338 4785996 6479029 11626784
2048 2048 1954120 3730203 11502234 1169007611579763 5816563 6378005 5868220 6459541 5750369 4031308 6440169 11380325
4096 4 1537512 2886496 5953231 9550708 8292220 4307020 5404504 5556581 7742845 3980686 2957556 5885924 8920873
4096 8 1671225 3360164 6919538 1061268110950922 5286429 6032669 7001316 10502389 4757904 3237937 6693092 10752164
4096 16 1838440 3438858 6930704 1125953911252164 5520868 6608135 6861502 9874590 4773769 3268741 6804432 9566663
4096 32 1885037 3552638 6661947 1016677111907264 6066754 6459069 7108502 9920205 4990078 3399392 6480999 11409087
4096 64 1901520 3615440 7061751 1069193912523544 6330545 7087972 7286380 11341302 5120972 3474326 6532752 12264277
4096 128 1931232 3540193 6430059 1100705112151506 6330545 6512939 7418527 11281721 5101205 3491981 6449370 10288543
4096 256 1929280 3720353 6532752 1104242511289134 6005255 6284231 6780263 11633127 4836939 3407483 6321227 10950922
4096 512 1959873 3730046 6724530 1104242511439475 5769304 6169144 6451792 10344298 4871226 3771811 5794602 10041975
4096 1024 1944126 3747131 7197849 1066538810978915 5696610 6351609 6300364 9593374 4231697 3516281 6351609 9685316
4096 2048 1935584 3653887 7261741 8552280 8642630 5013377 6005255 5988509 8028705 3751222 4248440 6216019 8514134
4096 4096 1858326 3287506 6575257 6804432 6790983 3996428 5736555 3540193 5696610 3730856 3747131 5611025 6512939
8192 4 1542192 2961585 5859631 6450345 6563708 3240321 5315713 5576245 6229323 3449147 2837582 5672914 6155667
8192 8 1720670 3289963 5665431 7142200 7922821 3756063 6173362 6983962 7571884 3919746 3231483 6606618 6966969
8192 16 1802449 3323375 6763986 7473073 8515834 4051471 6429825 6872214 8000301 3978753 3234221 6843471 7142200
8192 32 1851298 3487304 6775991 7530397 8770148 4271577 6591409 6854392 8307870 4106182 3347986 6792065 6978288
8192 64 1904662 3578839 6919267 7663074 9052027 4392252 6708520 7328036 8761203 4171488 3406404 6793408 6931830
8192 128 1928393 3600590 6340832 7092077 8496881 4488649 6425016 7440706 8659632 4047176 3397646 6370221 6912307
8192 256 1928393 3608910 6248582 6763986 7952160 4406334 6045199 6725591 7295362 3864202 3378271 6150158 6623173
8192 512 1943555 3616888 6434642 6989645 7669917 4293461 6150158 6420214 10894690 4017364 3497955 5414558 6267959
8192 1024 1941688 3615366 6670750 7136266 7930135 4182150 6239504 6425016 10447482 3294063 3050997 5897851 6470997
8192 2048 1931645 3544870 6930432 7211152 6827153 3946308 6131500 6307078 9547539 3320806 3096083 6210183 6470997
8192 4096 1809187 2945842 5756551 5876668 5316535 3229054 5214865 3951754 5700206 3104195 3959039 5143053 5382328
8192 8192 1675937 2830569 4468800 4540851 4452008 2906225 4341197 3094968 4427912 2963884 3086627 3913942 4586309
16384 4 1568443 2940398 5706741 5883111 5178244 2725254 5365018 5490615 5236246 2910139 2846374 5755011 5770960
16384 8 1718510 3271607 6736671 6701197 6248471 3104729 6032360 6954141 6405137 3257185 3218890 6641612 6577407
16384 16 1742035 3362206 6849477 6712324 6662863 3241820 6384903 6849477 6630078 3265699 3247642 6692713 6473317
16384 32 1857393 3458661 6820923 6857679 6585601 3537899 6509495 7077327 6736671 3360890 3330108 6750568 6553571
16384 64 1917353 3508278 6852209 6569233 6971779 3663708 6566722 7406867 6726121 3408398 3357442 6731392 6553571
16384 128 1889309 3558602 6528046 6480642 6841294 3778534 6402750 7394115 6747917 3392079 3401313 6419497 6447807
16384 256 1942391 3547946 6222445 6210635 6284471 3803842 6054683 6826343 6355378 3256568 3339008 6120472 6124836
16384 512 1959561 3592084 6326125 6306387 6481253 3809324 6163841 6407526 6289648 3369129 3376081 6145651 6241661
16384 1024 1951658 3592084 6468442 6488597 6533011 3842338 6136321 6501489 10930746 3004549 2881464 6289072 6270136
16384 2048 1943105 3503092 6671272 6686851 6504566 3673501 6070193 6318564 10421823 2801696 2719753 6226956 6253020
16384 4096 1826732 3132753 5441055 5485356 5088143 3356786 5147215 3704992 5895729 2864289 2714810 5097579 5269977
16384 8192 1704698 2844489 4491232 4497405 4509801 3023453 4428142 3096614 4438724 2765170 3430518 4389112 4474272
16384 16384 1669455 2839553 4367909 4489765 4333206 2943168 4364303 3013509 4371522 2853940 3033061 4482736 4388831
32768 64 1896944 3487076 6646689 6662800 6579865 3649002 6546954 7358410 6579865 3349489 3342646 6683211 6771790
32768 128 1927404 3573387 6454410 6523648 6551011 3772084 6426343 7438861 6517152 3345005 3348836 6518388 6553510
32768 256 1948029 3564860 6195463 6182643 6222672 3793951 6110080 6844976 6213107 3310202 3318594 6125875 6181530
32768 512 1952679 3597708 6319669 6352677 6339199 3838776 6173201 6544460 6351797 3327674 3328318 6239056 6282117
32768 1024 1957936 3609234 6401201 6482417 6438988 3838776 6261796 6551011 6459263 2794451 2809072 6289304 6328399
32768 2048 1936065 3577666 6441402 6509435 6500199 3819997 6243874 6509435 10914951 2595057 2583399 6226054 6315023
32768 4096 1784462 3143559 5299606 5309227 5208624 3254009 5094519 3976728 5927719 2515363 2507103 5127973 5140248
32768 8192 1703131 2894682 4501206 4271632 4504894 3061559 4414460 3149249 4469151 2659278 2688355 4458278 4362060
32768 16384 1700644 2857845 4412617 4359155 4442570 2972693 4416730 3034052 4446739 2718236 3412952 4357496 4451059
65536 64 1894928 3509282 6692780 6677822 6477804 3644541 6550981 7392806 6556293 3335823 3327545 6555043 6683180
65536 128 1937331 3585310 6215468 6518976 6378742 3764687 6477041 7400967 6444091 3337200 3333154 6488661 6525631
65536 256 1935217 3578868 6162379 6210132 6113994 3791063 6158927 6826753 6184980 3297408 3291919 6176225 6203825
65536 512 1965873 3573750 6299799 6358380 6293740 3832022 6223772 6606561 6295470 3312428 3316744 6135694 5787901
65536 1024 1964384 3572589 6338147 6406842 6307026 3831648 6237329 6578575 6366922 2766740 2765571 6321676 6318043
65536 2048 1941930 3559773 6270196 6463790 6347221 3824930 6192505 6537271 6351621 2509617 2524901 6232097 6359557
65536 4096 1785526 3154266 5139268 5023096 5066144 3307724 5072034 3962557 5818654 2362330 2374759 5087335 5074749
65536 8192 1705993 2882987 4453930 4395739 4469500 3014679 4396020 3199089 4437106 2405790 2416343 4432027 4362670
65536 16384 1699013 2870583 4450685 4458554 4391315 3012598 4396301 3103166 4388090 2666573 2690534 4405461 4343642
131072 64 1919338 3513988 6679510 6653077 6481379 3640096 6599804 7428248 6530034 3352398 3352909 6681864 6661138
131072 128 1941373 3581965 6538577 6551668 6391260 3781878 6497388 7491616 6488723 3352643 3332968 6535934 6545116
131072 256 1947349 3593579 6172190 6237669 6187334 3805807 6185593 6874628 6188169 3312244 3295842 6201083 6220518
131072 512 1966041 3592287 6315489 6362413 6302457 3818337 6206053 6593155 6307012 3316360 3309214 6281286 6338426
131072 1024 1962685 3600781 6355058 6404364 6378135 3840154 6289766 6582577 6367350 2765165 2754469 6325881 6152435
131072 2048 1960516 3578072 6342155 6425398 6365802 3827721 6264823 6543792 6385025 2507120 2497132 6284302 6392523
131072 4096 1809861 3136733 5157677 5182962 5084079 3328810 5112447 4043576 5138298 2312864 2304323 5124026 5150767
131072 8192 1727337 2887118 4469348 4469493 4445819 3041882 4435166 3171805 4461586 2299263 2300601 4457787 4477429
131072 16384 1729635 2890229 4430805 4456992 4454139 3035768 4441293 3177893 4446574 2417010 2414918 4431091 4434415
262144 64 1909266 3518281 6685635 6717002 6523595 3629544 6602451 7474037 6490171 3354278 3353510 6688197 6696058
262144 128 1949071 3567065 6559361 6581899 6440709 3742129 6512737 7309814 6472062 3327630 3357894 6619464 6586039
262144 256 1953833 3586836 6202685 6264316 6205486 3801449 6255513 6823297 6206922 3312492 3248775 6201216 6250605
262144 512 1966543 3605786 6326493 6365647 6314756 3825575 6356704 6504492 6378054 3334876 3311993 6327548 6334876
262144 1024 1969809 3628597 6384869 6414108 6365316 3855057 6372916 6583200 6375096 2765991 2763454 6388765 6399064
262144 2048 1967338 3594352 6393780 6390138 6402343 3841547 6331046 6568726 6384869 2501568 2501921 6360713 6385982
262144 4096 1799943 3121769 5123902 5164261 5123210 3311315 5062352 3981230 5121802 2276427 2279792 5108547 5106340
262144 8192 1694421 2863991 4427056 4435288 4344954 3023753 4412912 3137232 4427893 2230691 2250396 4455580 4460189
262144 16384 1729023 2877355 4418694 4418481 4405857 3026608 4408524 3179848 4426895 2285935 2173971 4310292 4356644
524288 64 1912635 3530702 6698788 6694179 6455870 3613386 6569527 7428484 6451571 3358452 3358129 6525450 6683497
524288 128 1951826 3601963 6547132 6525527 6422816 3760628 6492984 7392052 6443895 3328158 3328918 6593816 6556130
524288 256 1958001 3605660 6272890 6268849 6211863 3803046 6304560 6779789 6202087 3309002 3310317 6255830 6309354
524288 512 1978220 3616203 6350386 6345475 6308358 3862015 6320670 6511441 6309951 3313834 3312201 6350166 6361335
524288 1024 1981834 3623950 6392122 6408048 6392977 3852199 6380605 6576049 6385570 2764315 2761534 6389615 6407208
524288 2048 1957116 3575049 6335876 6384495 6351615 3803513 6341943 6509494 6359550 2483776 2481648 6367671 6376479
524288 4096 1812696 3151375 5127269 5141186 5123697 3336712 5119796 3948035 5118354 2268987 2269517 5125261 5122098
524288 8192 1726568 2895994 4453882 4465975 4457927 3052198 4460088 3186039 4462558 2222605 2228662 4463020 4468643
524288 16384 1730831 2913942 4455506 4450853 4435224 3051838 4458424 3190671 4462558 2248368 2248501 4457475 4461119
iozone test complete.
Excel output is below:
"Writer report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 627470 801764 799377 1279447 889431
"128" 1152564 895074 1015251 1196221 1306873 1561553
"256" 1185399 1369908 1549845 1471270 1619994 1407621 1755037
"512" 1354190 1575781 1571169 1589779 1635797 1707325 1801873 1897396
"1024" 1452570 1584972 1651398 1815435 1815435 1777861 1762539 1896395 1885572
"2048" 1486197 1728424 1798259 1838281 1906837 1887563 1948800 1967097 1889224 1954120
"4096" 1537512 1671225 1838440 1885037 1901520 1931232 1929280 1959873 1944126 1935584 1858326
"8192" 1542192 1720670 1802449 1851298 1904662 1928393 1928393 1943555 1941688 1931645 1809187 1675937
"16384" 1568443 1718510 1742035 1857393 1917353 1889309 1942391 1959561 1951658 1943105 1826732 1704698 1669455
"32768" 0 0 0 0 1896944 1927404 1948029 1952679 1957936 1936065 1784462 1703131 1700644
"65536" 0 0 0 0 1894928 1937331 1935217 1965873 1964384 1941930 1785526 1705993 1699013
"131072" 0 0 0 0 1919338 1941373 1947349 1966041 1962685 1960516 1809861 1727337 1729635
"262144" 0 0 0 0 1909266 1949071 1953833 1966543 1969809 1967338 1799943 1694421 1729023
"524288" 0 0 0 0 1912635 1951826 1958001 1978220 1981834 1957116 1812696 1726568 1730831
"Re-writer report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 1638743 1933893 1933893 2067979 2067979
"128" 1878447 1967960 2238774 2248149 2211113 2175277
"256" 2205688 2872459 3368013 3078337 3114048 2726577 2754556
"512" 2782414 3081897 3239989 2958758 2979282 2991733 3029721 3366987
"1024" 2892612 3037876 3170172 3458646 3291652 3369115 3390391 3603747 3778101
"2048" 2920945 3219850 3330973 3447273 3525079 3525079 3436240 3675930 3677503 3730203
"4096" 2886496 3360164 3438858 3552638 3615440 3540193 3720353 3730046 3747131 3653887 3287506
"8192" 2961585 3289963 3323375 3487304 3578839 3600590 3608910 3616888 3615366 3544870 2945842 2830569
"16384" 2940398 3271607 3362206 3458661 3508278 3558602 3547946 3592084 3592084 3503092 3132753 2844489 2839553
"32768" 0 0 0 0 3487076 3573387 3564860 3597708 3609234 3577666 3143559 2894682 2857845
"65536" 0 0 0 0 3509282 3585310 3578868 3573750 3572589 3559773 3154266 2882987 2870583
"131072" 0 0 0 0 3513988 3581965 3593579 3592287 3600781 3578072 3136733 2887118 2890229
"262144" 0 0 0 0 3518281 3567065 3586836 3605786 3628597 3594352 3121769 2863991 2877355
"524288" 0 0 0 0 3530702 3601963 3605660 3616203 3623950 3575049 3151375 2895994 2913942
"Reader report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 4018152 4897948 7100397 7100397 12902017
"128" 4717434 5122535 5784891 6114306 9129573 12842051
"256" 5971678 6719046 6249745 6249745 8024634 8888172 12228612
"512" 5164632 6736026 6843354 7211022 6571132 6736026 8140399 11374040
"1024" 6059442 6559147 6733974 6559147 7257394 7008693 6776473 8183918 11489839
"2048" 4923146 5372719 6603549 7112016 5970183 6738230 6649556 7159438 8190205 11502234
"4096" 5953231 6919538 6930704 6661947 7061751 6430059 6532752 6724530 7197849 7261741 6575257
"8192" 5859631 5665431 6763986 6775991 6919267 6340832 6248582 6434642 6670750 6930432 5756551 4468800
"16384" 5706741 6736671 6849477 6820923 6852209 6528046 6222445 6326125 6468442 6671272 5441055 4491232 4367909
"32768" 0 0 0 0 6646689 6454410 6195463 6319669 6401201 6441402 5299606 4501206 4412617
"65536" 0 0 0 0 6692780 6215468 6162379 6299799 6338147 6270196 5139268 4453930 4450685
"131072" 0 0 0 0 6679510 6538577 6172190 6315489 6355058 6342155 5157677 4469348 4430805
"262144" 0 0 0 0 6685635 6559361 6202685 6326493 6384869 6393780 5123902 4427056 4418694
"524288" 0 0 0 0 6698788 6547132 6272890 6350386 6392122 6335876 5127269 4453882 4455506
"Re-Reader report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 12902017 7940539 22737791 9006179 7100397
"128" 10779307 6406138 15881078 14200794 6727225 9129573
"256" 5455847 12812277 12812277 12812277 13625180 7120034 12228612
"512" 5439343 6319739 5886650 8808176 6652558 7620440 6018636 11877300
"1024" 8750850 7941793 7590887 7811791 8750850 11368190 11132462 11614118 11645609
"2048" 9062970 11706006 9140117 9483197 9853037 10555264 11517657 11626784 11706006 11690076
"4096" 9550708 10612681 11259539 10166771 10691939 11007051 11042425 11042425 10665388 8552280 6804432
"8192" 6450345 7142200 7473073 7530397 7663074 7092077 6763986 6989645 7136266 7211152 5876668 4540851
"16384" 5883111 6701197 6712324 6857679 6569233 6480642 6210635 6306387 6488597 6686851 5485356 4497405 4489765
"32768" 0 0 0 0 6662800 6523648 6182643 6352677 6482417 6509435 5309227 4271632 4359155
"65536" 0 0 0 0 6677822 6518976 6210132 6358380 6406842 6463790 5023096 4395739 4458554
"131072" 0 0 0 0 6653077 6551668 6237669 6362413 6404364 6425398 5182962 4469493 4456992
"262144" 0 0 0 0 6717002 6581899 6264316 6365647 6414108 6390138 5164261 4435288 4418481
"524288" 0 0 0 0 6694179 6525527 6268849 6345475 6408048 6384495 5141186 4465975 4450853
"Random read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 5860307 12902017 10821524 12902017 12902017
"128" 9129573 10779307 11720614 11720614 9129573 12842051
"256" 8271916 10651598 11091721 11569783 12228612 11695808 11569783
"512" 8394979 10856530 11374040 11943357 12499490 11877300 11620224 11620224
"1024" 8457895 9832672 10230845 11773301 9045736 11773301 11249091 11645609 11645609
"2048" 8423109 10903620 11380325 11851361 12488897 11966935 11380325 11579763 11579763 11579763
"4096" 8292220 10950922 11252164 11907264 12523544 12151506 11289134 11439475 10978915 8642630 6790983
"8192" 6563708 7922821 8515834 8770148 9052027 8496881 7952160 7669917 7930135 6827153 5316535 4452008
"16384" 5178244 6248471 6662863 6585601 6971779 6841294 6284471 6481253 6533011 6504566 5088143 4509801 4333206
"32768" 0 0 0 0 6579865 6551011 6222672 6339199 6438988 6500199 5208624 4504894 4442570
"65536" 0 0 0 0 6477804 6378742 6113994 6293740 6307026 6347221 5066144 4469500 4391315
"131072" 0 0 0 0 6481379 6391260 6187334 6302457 6378135 6365802 5084079 4445819 4454139
"262144" 0 0 0 0 6523595 6440709 6205486 6314756 6365316 6402343 5123210 4344954 4405857
"524288" 0 0 0 0 6455870 6422816 6211863 6308358 6392977 6351615 5123697 4457927 4435224
"Random write report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 1933893 5389653 4897948 5860307 4643754
"128" 4012317 5074121 5545860 6114306 5847904 5784891
"256" 4332998 5428265 5687020 6107548 6249745 6213578 6073004
"512" 4411377 5278892 5566231 5822804 6246213 6246213 3877684 5624545
"1024" 4339202 4832290 4659297 5853003 6244448 6208343 5853003 5821271 5821271
"2048" 4423683 5389574 5765808 6132138 6340344 6397004 5953632 5836323 5804771 5816563
"4096" 4307020 5286429 5520868 6066754 6330545 6330545 6005255 5769304 5696610 5013377 3996428
"8192" 3240321 3756063 4051471 4271577 4392252 4488649 4406334 4293461 4182150 3946308 3229054 2906225
"16384" 2725254 3104729 3241820 3537899 3663708 3778534 3803842 3809324 3842338 3673501 3356786 3023453 2943168
"32768" 0 0 0 0 3649002 3772084 3793951 3838776 3838776 3819997 3254009 3061559 2972693
"65536" 0 0 0 0 3644541 3764687 3791063 3832022 3831648 3824930 3307724 3014679 3012598
"131072" 0 0 0 0 3640096 3781878 3805807 3818337 3840154 3827721 3328810 3041882 3035768
"262144" 0 0 0 0 3629544 3742129 3801449 3825575 3855057 3841547 3311315 3023753 3026608
"524288" 0 0 0 0 3613386 3760628 3803046 3862015 3852199 3803513 3336712 3052198 3051838
"Backward read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 3203069 4564786 4897948 4207076 3203069
"128" 3895854 5847904 3982553 4759253 6114306 6114306
"256" 5022044 4929815 5687020 4652146 6073004 6595234 5320671
"512" 4827914 4650188 5886650 5509113 6652558 6174377 5870558 6395018
"1024" 5018624 6355328 6692005 6317933 5720477 6355328 5925680 6208343 6317933
"2048" 5159722 4697018 6823876 6007763 6149699 6149699 6303124 6345027 6420913 6378005
"4096" 5404504 6032669 6608135 6459069 7087972 6512939 6284231 6169144 6351609 6005255 5736555
"8192" 5315713 6173362 6429825 6591409 6708520 6425016 6045199 6150158 6239504 6131500 5214865 4341197
"16384" 5365018 6032360 6384903 6509495 6566722 6402750 6054683 6163841 6136321 6070193 5147215 4428142 4364303
"32768" 0 0 0 0 6546954 6426343 6110080 6173201 6261796 6243874 5094519 4414460 4416730
"65536" 0 0 0 0 6550981 6477041 6158927 6223772 6237329 6192505 5072034 4396020 4396301
"131072" 0 0 0 0 6599804 6497388 6185593 6206053 6289766 6264823 5112447 4435166 4441293
"262144" 0 0 0 0 6602451 6512737 6255513 6356704 6372916 6331046 5062352 4412912 4408524
"524288" 0 0 0 0 6569527 6492984 6304560 6320670 6380605 6341943 5119796 4460088 4458424
"Record rewrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 3165299 3541098 5860307 4274062 4274062
"128" 5325799 6330599 3759450 6406138 6727225 6406138
"256" 5455847 6891544 6073004 6398720 6554972 6719046 6107548
"512" 5509113 6632013 6736026 6086873 6156675 6821616 5886650 5822804
"1024" 5310258 6963241 6874084 7054742 7369466 7113161 6441107 6059442 5821271
"2048" 5389574 7013303 6895083 6917293 7311791 7343043 6588354 6378005 6167360 5868220
"4096" 5556581 7001316 6861502 7108502 7286380 7418527 6780263 6451792 6300364 5988509 3540193
"8192" 5576245 6983962 6872214 6854392 7328036 7440706 6725591 6420214 6425016 6307078 3951754 3094968
"16384" 5490615 6954141 6849477 7077327 7406867 7394115 6826343 6407526 6501489 6318564 3704992 3096614 3013509
"32768" 0 0 0 0 7358410 7438861 6844976 6544460 6551011 6509435 3976728 3149249 3034052
"65536" 0 0 0 0 7392806 7400967 6826753 6606561 6578575 6537271 3962557 3199089 3103166
"131072" 0 0 0 0 7428248 7491616 6874628 6593155 6582577 6543792 4043576 3171805 3177893
"262144" 0 0 0 0 7474037 7309814 6823297 6504492 6583200 6568726 3981230 3137232 3179848
"524288" 0 0 0 0 7428484 7392052 6779789 6511441 6576049 6509494 3948035 3186039 3190671
"Stride read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 9318832 7100397 10402178 6421025 4274062
"128" 4759253 8036304 6114306 7176872 8548124 6727225
"256" 6595234 7735574 6891544 11569783 9114515 9192546 5022044
"512" 7758090 10434519 9510316 7620440 8701110 8955098 8140399 6174377
"1024" 6489770 9402175 10158253 9946527 12828238 12173747 10134284 8061038 6441107
"2048" 8128206 9015410 10339282 10452512 11564174 11072275 10240672 9268323 8221561 6459541
"4096" 7742845 10502389 9874590 9920205 11341302 11281721 11633127 10344298 9593374 8028705 5696610
"8192" 6229323 7571884 8000301 8307870 8761203 8659632 7295362 10894690 10447482 9547539 5700206 4427912
"16384" 5236246 6405137 6630078 6736671 6726121 6747917 6355378 6289648 10930746 10421823 5895729 4438724 4371522
"32768" 0 0 0 0 6579865 6517152 6213107 6351797 6459263 10914951 5927719 4469151 4446739
"65536" 0 0 0 0 6556293 6444091 6184980 6295470 6366922 6351621 5818654 4437106 4388090
"131072" 0 0 0 0 6530034 6488723 6188169 6307012 6367350 6385025 5138298 4461586 4446574
"262144" 0 0 0 0 6490171 6472062 6206922 6378054 6375096 6384869 5121802 4427893 4426895
"524288" 0 0 0 0 6451571 6443895 6202087 6309951 6385570 6359550 5118354 4462558 4462558
"Fwrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 3958892 2892445 4564786 2892445 5860307
"128" 4135958 4934216 3867787 5545860 4267461 6114306
"256" 4197489 3935921 3123106 5242734 5687020 4652146 5455847
"512" 3941742 4882800 4827914 5127637 4871723 5684095 4532414 5624545
"1024" 4199201 4674510 4805258 5120336 4949226 5417427 5444898 4594502 5813392
"2048" 4248644 4886737 5020987 5029807 5306340 5251194 4720248 5461535 3975338 5750369
"4096" 3980686 4757904 4773769 4990078 5120972 5101205 4836939 4871226 4231697 3751222 3730856
"8192" 3449147 3919746 3978753 4106182 4171488 4047176 3864202 4017364 3294063 3320806 3104195 2963884
"16384" 2910139 3257185 3265699 3360890 3408398 3392079 3256568 3369129 3004549 2801696 2864289 2765170 2853940
"32768" 0 0 0 0 3349489 3345005 3310202 3327674 2794451 2595057 2515363 2659278 2718236
"65536" 0 0 0 0 3335823 3337200 3297408 3312428 2766740 2509617 2362330 2405790 2666573
"131072" 0 0 0 0 3352398 3352643 3312244 3316360 2765165 2507120 2312864 2299263 2417010
"262144" 0 0 0 0 3354278 3327630 3312492 3334876 2765991 2501568 2276427 2230691 2285935
"524288" 0 0 0 0 3358452 3328158 3309002 3313834 2764315 2483776 2268987 2222605 2248368
"Re-Fwrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 1933893 2278628 3203069 3363612 2772930
"128" 2367096 2784517 2511022 2784517 4267461 3445772
"256" 2305128 2285501 3557725 2880164 3879045 4404088 2911402
"512" 2906696 3122224 2979282 3122224 3659616 4131319 5278892 3913012
"1024" 2805690 3018660 3170172 3390391 3369115 3643490 3999762 5885083 3908759
"2048" 2879817 3215029 3368858 3396834 3436240 3454204 3650932 4248644 4785996 4031308
"4096" 2957556 3237937 3268741 3399392 3474326 3491981 3407483 3771811 3516281 4248440 3747131
"8192" 2837582 3231483 3234221 3347986 3406404 3397646 3378271 3497955 3050997 3096083 3959039 3086627
"16384" 2846374 3218890 3247642 3330108 3357442 3401313 3339008 3376081 2881464 2719753 2714810 3430518 3033061
"32768" 0 0 0 0 3342646 3348836 3318594 3328318 2809072 2583399 2507103 2688355 3412952
"65536" 0 0 0 0 3327545 3333154 3291919 3316744 2765571 2524901 2374759 2416343 2690534
"131072" 0 0 0 0 3352909 3332968 3295842 3309214 2754469 2497132 2304323 2300601 2414918
"262144" 0 0 0 0 3353510 3357894 3248775 3311993 2763454 2501921 2279792 2250396 2173971
"524288" 0 0 0 0 3358129 3328918 3310317 3312201 2761534 2481648 2269517 2228662 2248501
"Fread report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 3541098 4564786 5283570 4897948 4564786
"128" 4407601 6114306 6727225 4267461 6406138 6406138
"256" 3994490 5455847 6249745 6595234 6554972 6249745 6213578
"512" 5566231 5807059 5067142 5164632 6319739 5822804 6035551 6319739
"1024" 5071963 6317933 5782087 5917516 6355328 5720477 5782087 6280976 6441107
"2048" 4889518 6690992 6603549 6149699 7088541 5754221 5578583 6340344 6479029 6440169
"4096" 5885924 6693092 6804432 6480999 6532752 6449370 6321227 5794602 6351609 6216019 5611025
"8192" 5672914 6606618 6843471 6792065 6793408 6370221 6150158 5414558 5897851 6210183 5143053 3913942
"16384" 5755011 6641612 6692713 6750568 6731392 6419497 6120472 6145651 6289072 6226956 5097579 4389112 4482736
"32768" 0 0 0 0 6683211 6518388 6125875 6239056 6289304 6226054 5127973 4458278 4357496
"65536" 0 0 0 0 6555043 6488661 6176225 6135694 6321676 6232097 5087335 4432027 4405461
"131072" 0 0 0 0 6681864 6535934 6201083 6281286 6325881 6284302 5124026 4457787 4431091
"262144" 0 0 0 0 6688197 6619464 6201216 6327548 6388765 6360713 5108547 4455580 4310292
"524288" 0 0 0 0 6525450 6593816 6255830 6350166 6389615 6367671 5125261 4463020 4457475
"Re-Fread report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 6421025 7940539 15972885 9318832 20962191
"128" 8036304 12842051 14200794 14200794 16365173 14200794
"256" 5022044 6936061 12228612 12812277 13454450 6719046 12228612
"512" 8394979 8018812 6018636 6246213 12797441 12215097 8265729 11620224
"1024" 7826025 8970167 7113161 7319232 7811791 9855234 9485232 10230845 10230845
"2048" 9567698 10389302 8784909 8749118 9567698 11320334 10503637 11320334 11626784 11380325
"4096" 8920873 10752164 9566663 11409087 12264277 10288543 10950922 10041975 9685316 8514134 6512939
"8192" 6155667 6966969 7142200 6978288 6931830 6912307 6623173 6267959 6470997 6470997 5382328 4586309
"16384" 5770960 6577407 6473317 6553571 6553571 6447807 6124836 6241661 6270136 6253020 5269977 4474272 4388831
"32768" 0 0 0 0 6771790 6553510 6181530 6282117 6328399 6315023 5140248 4362060 4451059
"65536" 0 0 0 0 6683180 6525631 6203825 5787901 6318043 6359557 5074749 4362670 4343642
"131072" 0 0 0 0 6661138 6545116 6220518 6338426 6152435 6392523 5150767 4477429 4434415
"262144" 0 0 0 0 6696058 6586039 6250605 6334876 6399064 6385982 5106340 4460189 4356644
"524288" 0 0 0 0 6683497 6556130 6309354 6361335 6407208 6376479 5122098 4468643 4461119
-
passerby
Re: Use Ram as suplimental HDD Buffer/Cache?
Very: http://ubuntuforums.org/showthread.php?t=1802917&p=11043496#post11043496XenonK wrote:Is swapping the IO scheduler an easy task?
Some custom kernels will do it for you automatically.
Yes. I believe the default is 60. I always set mine to 10.XenonK wrote:So if I get what you are saying, a swapiness setting of 100 will be no good for me.... I would have to set this to something lower like 5 prehaps?
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
passerby wrote:Very: http://ubuntuforums.org/showthread.php?t=1802917&p=11043496#post11043496XenonK wrote:Is swapping the IO scheduler an easy task?
Some custom kernels will do it for you automatically.
Yes. I believe the default is 60. I always set mine to 10.XenonK wrote:So if I get what you are saying, a swapiness setting of 100 will be no good for me.... I would have to set this to something lower like 5 prehaps?
Much appreciated for the help I will keep tweaking and compare my results to IOzone benches to get the best speeds on my SSD.
Naturally still open to other suggestions as well. I must try swapping my scheduler some day.
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
Hi guys, I have changed my IO scheduler from CFQ to DEADLINE as described in the past posts, and have these results when I run IOzone:
It looks like I am getting peak something like 16GB/s and there after averaging at about 3GB/s using DEADLINE according to these figures.
Here is a quick test using NOOP.
Here it looks like I still get about 16GB/s but it looks like a more consistent average of about 6GB/s...
Any other tests I could run to test my system and possibly compare it to something. Perhaps someone knows some tests.
Code: Select all
iozone -A -+B
Iozone: Performance Test of File I/O
Version $Revision: 3.397 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
Ben England.
Run began: Sun Oct 20 00:20:46 2013
Auto Mode 2. This option is obsolete. Use -az -i0 -i1
>>> Sequential Mixed workload. <<<
Command line used: iozone -A -+B
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
KB reclen write rewrite read reread
64 4 780776 1734015 3406295 10402178
64 8 983980 1452528 4564786 7100397
64 16 811459 2006158 5283570 9006179
64 32 969761 1892980 5735102 12902017
64 64 1210227 2222043 7940539 10821524
128 4 1059322 1391557 4104338 4717434
128 8 1196221 2784517 7176872 14200794
128 16 1220700 1939522 5325799 6114306
128 32 1254941 2175277 5325799 14200794
128 64 1406136 3468030 6727225 8548124
128 128 1543594 2276751 12842051 16365173
256 4 1143731 1911233 5455847 5540300
256 8 1292410 2392442 5117791 6891544
256 16 1384034 2726577 6249745 6936061
256 32 1292410 3052087 5687020 12812277
256 64 1610276 2435861 7791708 13454450
256 128 1570244 2509882 7314033 7073132
256 256 1752173 3465855 11091721 9868433
512 4 1209982 2099600 5127637 8992598
512 8 1441452 2381315 6472112 7871843
512 16 1450212 2830083 6571132 11620224
512 32 1616100 2764505 6491676 11374040
512 64 1476130 2942541 7309196 11138071
512 128 1625889 2875558 7410080 10641343
512 256 1506154 3046915 7988981 9344779
512 512 1827947 3220553 11620224 11374040
1024 4 1248607 2115949 3804877 7208671
1024 8 1418508 2573677 5417427 8840915
1024 16 1605111 2900425 6280976 11398360
1024 32 1727102 3101494 5983467 11368190
1024 64 1726407 3239514 6441107 10796646
1024 128 1780809 3414650 6569179 12173747
1024 256 1765437 3594699 6650556 8000971
1024 512 1560781 3436508 8000971 11489839
1024 1024 1885572 3603747 11520658 11645609
2048 4 1272808 2066474 4631177 6990474
2048 8 1512630 2752473 5238385 10555264
2048 16 1665101 3016334 5503525 9653719
2048 32 1715309 3250308 6945257 10555264
2048 64 1776319 3319389 6780783 12398764
2048 128 1853353 3525079 6340344 11440955
2048 256 1798259 3530875 5937172 11380325
2048 512 1915768 3561619 6717153 11517657
2048 1024 1906837 3592903 7636816 11440955
2048 2048 1897990 3669648 11072275 11072275
4096 4 1281237 2235854 4691638 7784948
4096 8 1508619 2769246 5093643 8883968
4096 16 1689800 3082251 6189146 9163546
4096 32 1757206 3346419 6490793 10950922
4096 64 1841791 3462422 6618318 10665388
4096 128 1874752 3561476 6490793 10665388
4096 256 1838440 3571100 5859825 10190895
4096 512 1813215 3637640 5810280 10288543
4096 1024 1902362 3647681 6772244 10012712
4096 2048 1912954 3602551 7038605 9795765
4096 4096 1789419 3139133 5751920 6094733
8192 4 1240835 2103725 5494212 6064404
8192 8 1488671 2443827 4911476 6804170
8192 16 1548307 2833604 6496691 7379976
8192 32 1748604 3254747 6210183 6848927
8192 64 1804342 3412155 5923270 6215800
8192 128 1884087 3455043 5517150 6506533
8192 256 1854195 3434666 5665431 6278267
8192 512 1925691 3434666 6354905 6884607
8192 1024 1907411 3499380 6532510 6943036
8192 2048 1888851 3460959 6730861 6959913
8192 4096 1746737 2997498 5393311 5704938
8192 8192 1643628 2644316 3942685 4483963
16384 4 1184230 1985434 5008779 5247842
16384 8 1378198 2398099 5917050 5874561
16384 16 1563981 2691208 5945205 5868541
16384 32 1627351 2867277 6311600 6122108
16384 64 1813762 3329302 6861103 6643539
16384 128 1819621 3312451 6367745 6467833
16384 256 1859705 3416872 6304073 6222445
16384 512 1858448 3332046 6333122 6357730
16384 1024 1871608 3471942 6529907 6574890
16384 2048 1849196 3396438 5795294 6372469
16384 4096 1731021 3013376 5214393 5280100
16384 8192 1590846 2633656 4100989 4155044
16384 16384 1599362 2520168 4291264 4437864
32768 4 1184330 1985830 5092254 4056543
32768 8 1418273 2470643 6367688 6158264
32768 16 1501805 2764269 6094095 6245009
32768 32 1690561 2948839 6558827 6712261
32768 64 1796498 3270580 6522100 6370344
32768 128 1835828 3332434 6562898 6514680
32768 256 1855507 3366637 6230853 6245009
32768 512 1881596 3397009 6317346 6344174
32768 1024 1885701 3409481 6380103 6468383
32768 2048 1849315 3341265 6278673 6464428
32768 4096 1691352 2993607 4953682 5096786
32768 8192 1623464 2730658 4256155 4238044
32768 16384 1653205 2770845 3852333 3727480
65536 4 1266912 2119813 5372612 5293666
65536 8 1493497 2618488 6251657 6406991
65536 16 1559486 2892026 6620404 6570555
65536 32 1724910 3114982 6772425 6660831
65536 64 1701790 3267967 6688058 6798388
65536 128 1843014 3363045 6570712 6579205
65536 256 1857222 3381830 6198369 6251657
65536 512 1879175 3394065 6259487 6311950
65536 1024 1869742 3422932 6326477 6428869
65536 2048 1846084 3285505 6231390 6326477
65536 4096 1727718 2953776 4964042 4801125
65536 8192 1617178 2701853 4217548 4069021
65536 16384 1634603 2735326 4120255 4226432
131072 4 1269744 2124546 5524917 5465160
131072 8 1496920 2625162 6523293 6262682
131072 16 1554515 2909225 6594500 6477789
131072 32 1720644 3127329 6760749 6729549
131072 64 1807391 3273295 6774078 6695862
131072 128 1847280 3360205 6621106 6607736
131072 256 1867917 3382846 6241564 6236183
131072 512 1910195 3497490 6203672 6246600
131072 1024 1908497 3488944 6242415 6283081
131072 2048 1903759 3454177 6169558 6241848
131072 4096 1759450 3031265 5093359 5110213
131072 8192 1657084 2698283 4074081 4122041
131072 16384 1645828 2675812 4051921 3861300
262144 4 1277404 2141332 5528245 5585479
262144 8 1499055 2639650 6386909 6519881
262144 16 1641859 2926437 6455646 6327403
262144 32 1738930 3147813 6328313 6466163
262144 64 1815829 3302146 6721807 6759079
262144 128 1856082 3380670 6456101 6508535
262144 256 1877242 3389507 6069391 6073616
262144 512 1915823 3505393 6235151 6243436
262144 1024 1891356 3439404 6246309 6393445
262144 2048 1878358 3388108 5931001 6053719
262144 4096 1681390 2949580 4875476 4923352
262144 8192 1701019 2842872 4481641 4486469
262144 16384 1692791 2836843 4446211 4462542
524288 4 1301592 2180083 4985194 4863171
524288 8 1512376 2651723 6088444 6300189
524288 16 1651519 2929258 5758175 5883803
524288 32 1687550 3161006 6458885 6430704
524288 64 1821356 3308414 6139422 6212021
524288 128 1858814 3385848 6621892 6725935
524288 256 1887768 3420076 6296852 6308449
524288 512 1899036 3441045 6356627 6366971
524288 1024 1910071 3529416 6307978 6311110
524288 2048 1910767 3462958 6254335 6283788
524288 4096 1711129 2932946 4972108 5055623
524288 8192 1641339 2684171 4075557 4000764
524288 16384 1623670 2764210 3829411 3871221
iozone test complete.
Here is a quick test using NOOP.
Code: Select all
SR2 adam # cat /sys/block/sda/queue/scheduler
[noop] deadline cfq
SR2 adam # iozone -A -+B
Iozone: Performance Test of File I/O
Version $Revision: 3.397 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
Ben England.
Run began: Sun Oct 20 00:56:48 2013
Auto Mode 2. This option is obsolete. Use -az -i0 -i1
>>> Sequential Mixed workload. <<<
Command line used: iozone -A -+B
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
KB reclen write rewrite read reread
64 4 842003 1421755 4564786 8182586
64 8 1101022 1828508 4897948 15972885
64 16 1124074 1991276 4988978 9006179
64 32 710511 1679761 7940539 16983463
64 64 1049372 1991276 7940539 9006179
128 4 1059322 2211113 4407601 9287508
128 8 780556 1911894 6114306 5603747
128 16 1082825 2035099 6114306 6727225
128 32 1185654 2286447 5847904 12842051
128 64 1057236 2673584 6330599 14200794
128 128 1206978 2905056 12842051 12842051
256 4 1023775 1707589 3879045 4734192
256 8 1280084 2228578 5022044 6891544
256 16 1398455 2223962 6595234 5810112
256 32 1523457 3326279 5320671 11695808
256 64 1579483 2392442 5841722 6554972
256 128 1340826 2486631 7120034 7518900
256 256 1683493 2588541 9868433 7735574
512 4 1140576 1975959 5177083 8528336
512 8 1380303 2668325 4882800 7540170
512 16 1488408 2521095 5019764 7988981
512 32 1550747 2800557 5566231 8528336
512 64 1652157 3415178 6736026 10694336
512 128 1547395 2942541 6999490 11620224
512 256 1619757 3046915 6472112 10694336
512 512 1815584 3239989 11374040 11620224
1024 4 1247157 2060128 4178773 7590887
1024 8 1444266 2681328 5821271 8610501
1024 16 1589665 3112733 5536137 8988941
1024 32 1620249 3335105 5885083 10454984
1024 64 1765437 3579719 7472033 11249091
1024 128 1796451 3458646 5983467 8895850
1024 256 1861867 3532609 6787181 11132462
1024 512 1790460 3422814 7811791 11132462
1024 1024 1790460 3655895 11520658 11614118
2048 4 1274507 2240576 4796687 7311791
2048 8 1507057 2844532 4983122 9752360
2048 16 1657071 3012103 5629769 11380325
2048 32 1756343 3448657 6738230 10555264
2048 64 1807720 3567536 6851089 12204980
2048 128 1807720 3624742 6097316 10945301
2048 256 1838281 3598924 5816563 11260973
2048 512 1882186 3663388 7088541 11440955
2048 1024 1868674 3598924 8097557 11380325
2048 2048 1895895 3669648 9796850 10555264
4096 4 1289701 2222261 4526013 7038605
4096 8 1534628 2780451 5777065 9891647
4096 16 1690465 3093907 5527974 10950922
4096 32 1799729 3360164 6872481 11252164
4096 64 1847535 3408159 6978564 11508442
4096 128 1892721 3509816 5761565 10288543
4096 256 1880704 3533639 6330545 10089154
4096 512 1909552 3646906 6410863 9801354
4096 1024 1923879 3598778 6503078 9966244
4096 2048 1904260 3562214 7355007 8062616
4096 4096 1818782 3240380 5544029 6430059
8192 4 1292944 2167149 5364680 5724900
8192 8 1511726 2747942 5421393 6961323
8192 16 1712438 2937280 4727012 6989645
8192 32 1783549 3182693 6670750 6230453
8192 64 1847118 3375284 6633402 7287625
8192 128 1888955 3453654 6292063 7049878
8192 256 1898977 3334341 5974769 6527546
8192 512 1925259 3363060 6365501 6890129
8192 1024 1904662 3424738 6461262 6741425
8192 2048 1861831 3061326 6365501 6827153
8192 4096 1677000 3069531 5661696 5793435
8192 8192 1634480 2536184 4447398 4017834
16384 4 1294156 2130585 5253057 5312346
16384 8 1547673 2658002 6199429 5448389
16384 16 1702586 2902396 6375425 6182697
16384 32 1786693 3140484 6470878 6460536
16384 64 1824501 3309261 6493502 6466008
16384 128 1897185 3392079 6206148 6059488
16384 256 1895197 3417552 6010201 6034479
16384 512 1918048 3397781 6075022 6139062
16384 1024 1927950 3402829 6201108 6246199
16384 2048 1874160 3306554 6267848 6364797
16384 4096 1702966 2871350 5075366 4825871
16384 8192 1626542 2656666 4062441 4099032
16384 16384 1598283 2664908 4146770 4293409
32768 4 1299809 2143370 4814512 5190526
32768 8 1516537 2636627 5949015 6062643
32768 16 1662163 2905452 6340369 6264079
32768 32 1750328 3125260 6221545 6042386
32768 64 1837399 3278068 6330731 6266650
32768 128 1869999 3353657 5650620 6042386
32768 256 1872878 3370104 5964506 5898969
32768 512 1877483 3412952 6014621 6001489
32768 1024 1889096 3429816 6119057 6169875
32768 2048 1870839 3361861 6061306 6163788
32768 4096 1700391 2966022 5021920 4964059
32768 8192 1651954 2733373 4027538 3990353
32768 16384 1641105 2700504 4155145 3931791
65536 4 1289013 2162183 5310028 5445088
65536 8 1505744 2677665 6122028 5988911
65536 16 1668598 2953015 6278072 6307026
65536 32 1766989 3153035 6259344 6331869
65536 64 1831532 3321153 6321531 6341803
65536 128 1864087 3403226 6166250 6237329
65536 256 1864314 3423486 5920162 6072126
65536 512 1904670 3451990 5910106 6068104
65536 1024 1903905 3456548 5971996 6203685
65536 2048 1880898 3422591 6068774 6184980
65536 4096 1715694 2916358 4925261 4823789
65536 8192 1609828 2636723 4191630 4124582
65536 16384 1597349 2775540 4308174 4003709
131072 4 1281778 2174169 4978012 5376437
131072 8 1518671 2702793 6217775 6330470
131072 16 1673631 2972700 6391854 6558468
131072 32 1771937 3214837 6361824 6472070
131072 64 1845407 3359691 6341204 6477179
131072 128 1873634 3439675 6305203 6367350
131072 256 1896764 3462204 5964597 5917473
131072 512 1915473 3487616 6174200 6182046
131072 1024 1913380 3500764 5933568 6267180
131072 2048 1912933 3457370 6113777 6238236
131072 4096 1688372 3031984 4958839 5007713
131072 8192 1653859 2718766 4172694 4089081
131072 16384 1661517 2734371 4049682 4189994
262144 4 1291184 2176786 5434496 5515903
262144 8 1522376 2707091 5780459 5623962
262144 16 1672925 2991381 6418938 6407342
262144 32 1773952 3228570 6584067 6536432
262144 64 1854233 3400230 6556857 6570493
262144 128 1890075 3479898 5736428 6351783
262144 256 1895609 3492788 6136735 6157527
262144 512 1915963 3515548 6230558 6168547
262144 1024 1934044 3546219 6269138 6325546
262144 2048 1912580 3497632 6184960 6262568
262144 4096 1750742 3036781 5045325 4899046
262144 8192 1676284 2820636 4436720 4444396
262144 16384 1667116 2638592 4279624 4268326
524288 4 1303184 2195068 5558481 5565698
524288 8 1531035 2715548 6358245 6338652
524288 16 1685646 3027924 6366510 6558926
524288 32 1789689 3261388 6617209 6612454
524288 64 1861870 3407743 6290871 6274232
524288 128 1895056 3494230 6218433 6228313
524288 256 1911192 3509101 6094873 6131445
524288 512 1926941 3550523 6093472 5971455
524288 1024 1930715 3556760 6347618 6361868
524288 2048 1935385 3525172 6291033 6308738
524288 4096 1788049 3094897 5127807 5151387
524288 8192 1691508 2849421 4234959 4263302
524288 16384 1693929 2759351 3994935 4008779
iozone test complete.
Any other tests I could run to test my system and possibly compare it to something. Perhaps someone knows some tests.
-
teatime
Re: Use Ram as suplimental HDD Buffer/Cache?
CFQ is a good default scheduler and is the best for average users - noop, deadline get used in large database systems and often you use noop as databases have their own scheduler. Concerning
Code: Select all
nano /proc/sys/vm/swappiness
(Set this to 100) is not a good idea as it means the system should always swap - swapping takes time as your hd is much slower as RAM and therefore you should lower it; swappiness 50 means in case your system ram is filled 50% the kernel start swapping - depends how much ram you have but I have set it to 20 and here is some background information: http://www.linuxvox.com/2009/10/what-is-the-linux-kernel-parameter-vm-swappiness/
Code: Select all
nano /proc/sys/vm/swappiness
(Set this to 100) is not a good idea as it means the system should always swap - swapping takes time as your hd is much slower as RAM and therefore you should lower it; swappiness 50 means in case your system ram is filled 50% the kernel start swapping - depends how much ram you have but I have set it to 20 and here is some background information: http://www.linuxvox.com/2009/10/what-is-the-linux-kernel-parameter-vm-swappiness/
-
XenonK
Re: Use Ram as suplimental HDD Buffer/Cache?
teatime wrote:CFQ is a good default scheduler and is the best for average users - noop, deadline get used in large database systems and often you use noop as databases have their own scheduler. Concerning
Code: Select all
nano /proc/sys/vm/swappiness
(Set this to 100) is not a good idea as it means the system should always swap - swapping takes time as your hd is much slower as RAM and therefore you should lower it; swappiness 50 means in case your system ram is filled 50% the kernel start swapping - depends how much ram you have but I have set it to 20 and here is some background information: http://www.linuxvox.com/2009/10/what-is-the-linux-kernel-parameter-vm-swappiness/
Thanks for the advice,
I have to do my whole install again since I lent my mate my IBM M1015, so I will be testing these settings again when I install it all on the Revodrive X2.
I'll Probally go for a swapiness setting of 5 as I have a lot of RAM as mentioned before, and my files are non-critical. I dont want to have it swapping to disk for the point you mentioned. I got confused with this setting clearly....
Another thing... I have played around with the default priority settings in /etc/security/limits.conf and upped my cpu priorities for running processes, but I also see there is a ionice command to elevate IO scheduling? My question is, can I also set a default ionice value for processes for all users? if so how. Forgive me if my desription of this is perhaps wrong, I just want to aviod having to find the process PID and then elevating the process from the terminal.
Thanks.